Juniper EX9200 Features Manual page 126

Spanning-Tree Protocols Feature Guide for EX9200 Switches
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110
port. If the port receives superior BPDU packets, root protect moves this port to a
root-prevented spanning-tree state. For configuration details, see Checking the Status
of Spanning-Tree Instance Interfaces.
Configure the bridge priority
3.
[edit ... protocols mstp]
user@switch# set bridge-priority bridge-priority
For more information, see Bridge Priority for Election of Root Bridge and Designated
Bridge.
Configure hello BPDU timers.
4.
Configure the maximum expected arrival time of hello BPDUs:
a.
[edit ... protocols mstp]
user@switch# set max-age
Configure the time interval at which the root bridge transmits configuration BPDUs:
b.
[edit ... protocols mstp]
user@switch# set hello-time
(Optional) By default, the bridge port remains in the listening and learning states for
5.
15 seconds before transitioning to the forwarding state. You can specify a delay from
through seconds instead:
4 20
[edit ... protocols mstp]
user@switch# set forward-delay
Configure MSTP-specific options.
6.
Configure the MSTP region configuration name:
a.
[edit ... protocols mstp]
user@switch# set configuration-name
Configure the MSTP revision level:
b.
[edit ... protocols mstp]
user@switch# set revision-level
Configure the maximum number of hops a BPDU can be forwarded in the MSTP
c.
region:
[edit ... protocols mstp]
user@switch# set max-hops
Configuring MST Instances on a Physical Interface
seconds
seconds
seconds
configuration-name
revision-level
hops
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